Bonajour Extreme Spot Serum for skin with dark spots

How to apply

Questions and answers

What the research says

• Cosmetic formulations containing 5% Centella asiatica extract showed the best efficacy in improving skin moisture and decreasing transepidermal water loss, while also exhibiting antiinflammatory properties in 25 volunteers compared to baseline measurements.

  Indian Journal of Pharmaceutical Sciences, 2016

• A single application of a moisturizing fluid containing hyaluronic acid 1%, glycerin 5%, and Centella asiatica stem cells extract significantly increased skin hydration by 29% and reduced transepidermal water loss at 24 hours compared to baseline and an untreated control site in twenty healthy women.

  Clinical, Cosmetic and Investigational Dermatology, 2017

• Niacinamide significantly decreased hyperpigmentation and increased skin lightness compared with vehicle alone after 4 weeks of use in women by inhibiting melanosome transfer.

  The British Journal of Dermatology, 2002

• Topical treatment of nicotinamide, alone or in combination with other active ingredients, reduces the progression of skin aging and hyperpigmentation in clinical trials while being well tolerated.

  Antioxidants, 2021

• Topical application of 0.05% w/w ECa 233 gel reduced erythema index by 0.03 U and improved early crusting and general wound appearance compared to placebo in thirty individuals undergoing facial laser resurfacing.

  Journal of Alternative and Complementary Medicine, 2020

• Moisturizer containing 5% panthenol, madecassoside, and copper-zinc-manganese decreased adverse reactions and downtime after ablative fractional carbon dioxide laser resurfacing with comparable efficacy to 0.02% triamcinolone acetonide cream in 20 subjects.

  Journal of Cosmetic Dermatology, 2019

• Topical treatment with 5% vitamin C and 0.1% madecassoside significantly improved clinical scores for wrinkles, suppleness, firmness, roughness, and skin hydration, along with functional and structural remodeling of the elastic fiber network in 20 female volunteers with photoaged skin after 6 months compared to baseline.

  Experimental Dermatology, 2008

• Topical post-laser application of human adipocyte-derived mesenchymal stem cell media combined with niacinamide significantly improved wrinkle index, melanin index, patient satisfaction, and investigator esthetic improvement scores compared to vehicle cream in patients with aging skin.

  Journal of Cosmetic Dermatology, 2021

• Topical nicotinamide prevented solar-simulated UV-induced immunosuppression in healthy volunteers, and men experienced immunosuppression at solar-simulated UV doses three times lower than those required for women.

  The Journal of Investigative Dermatology, 2008

• Topical 5% niacinamide applied twice daily for 12 weeks reduced fine lines and wrinkles, hyperpigmented spots, red blotchiness, and skin sallowness, and improved skin elasticity compared to vehicle control in 50 female white subjects with facial photoaging.

  Dermatologic Surgery, 2005

• Topical treatment with sphingolipids and glycosaminoglycans attenuated clinical worsening and reduced CADESI and PVAS scores compared to the untreated control group in house dust mite-allergic beagle dogs.

  BMC Veterinary Research, 2020

• Glycosaminoglycans restored type I collagen synthesis, reduced matrix metalloproteinase-1 levels, upregulated tissue inhibitor of metalloproteinase-1, and attenuated apoptosis in tumor necrosis factor-alpha-stimulated human dermal fibroblasts by inhibiting extracellular signal-regulated kinase/activator protein-1 signaling.

  International Journal of Molecular Medicine, 2018

• Fraction 3 of glycosaminoglycans from Liparis tessellatus eggs showed 20.1% tyrosinase inhibition at 50mg/mL and effective skin regeneration activities at 200mg/mL against skin fibroblast CCD-986sk cell lines.

  International Journal of Biological Macromolecules, 2017

• Topical gel containing chitosan, 0.2% chlorhexidine, allantoin and dexpanthenol did not improve postoperative comfort regarding swelling and pain, but improved the wound's aesthetic appearance following impacted lower third molar extraction compared to no gel.

  Medicina Oral, Patologia Oral Y Cirugia Bucal, 2016

• A topical gel containing chitosan, chlorhexidine, allantoin, and dexpanthenol significantly reduced postoperative pain, trismus, swelling, and analgesic consumption, while improving wound healing after third molar surgery compared to a placebo.

  Medicina Oral, Patologia Oral Y Cirugia Bucal, 2020

• An overnight patch containing Allium cepa extract and allantoin safely promotes scar healing after dermatologic surgery, resulting in significantly greater reductions in observer- and patient-assessed POSAS scores compared to no treatment.

  Aesthetic Plastic Surgery, 2018

• Akebia quinata fruit extract reduced CML expression, stimulated fibrillin-1 expression, and decreased deep crow's feet wrinkle depth in humans compared to treatment without the extract.

  Nutrients, 2015

Ingredients

Centella Asiatica Extract, Glycerin, Water, Niacinamide, Akebia Quinata Extract, Nicotinoyl Dipeptide-23, Glycosaminoglycans, Salix Nigra Bark Extract Willow Bark Extract, Aminobutyric Acid, Allantoin, 1,2-Hexanediol, Ammonium Acryloyldimethyltaurate Vp Copolymer, Butylene Glycol, Pentylene Glycol, Caprylyl Glycol, Xanthan Gum, Zanthoxylum Piperitum Fruit Extract, Pulsatilla Koreana Extract, Usnea Barbata Extract

Behind this fit score

Lovi calculates every fit score from the full ingredient list with brand-independent rules our dermatologists and cosmetic chemists build and review, and personalizes every pick with AI trained on the real results of millions of users. Lovi trains its fit score models on a proprietary dataset built from more than 10,000 expert-labeled products and more than 100,000 simulated examples, following an internally consistent methodology presented at Cosmoprof, AMWC, and Skin of Color Update.